Roller-bearing brake-shoe.



PATENTED NOV. 15, 1904.

J. N. MGNEAGB.

ROLLER BEARING BRAKE SHOE.

APPLICATION FILED JUNE 21, 1902. RENEWED SEPT. 15. 1904.

N0 MODEL.

' attozwu o 4 C IW Fr. E

of Fig. 3.

UNTTED STATES Patented November 15, 1904.

JAMES N. MCNEACE, OF CINCINNATI, OHIO.

ROLLER-BEARING BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 775,280, dated November 15, 1904. Application filed June 21, 1902. Renewed September 15, 1904. Serial No. 224,538. \No model.)

1'11 u/Z Hill/(NIL it may calmer/1,.-

Be it known that I, J AMES N. MoNnAon, a citizen of the United States, residing at Oincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Roller- Bearing Brake-Shoe, of which the following is a specification.

This invention relates generally to brakeshoes for vehicles, and more particularly to a roller-bearing brake-shoe, the object of the invention being to provide a shoe which will last longer than the shoes now in use.

Brake-shoes as now constructed consist of a solid body in which a hard wearing-surface is inserted, said hard wearing-surface being brought into contact with the tread of the wheel, and the effect is to rapidly wear away beneath the tread of the wheel and the frictionface of the brake-shoe.

The object of my invention is to provide a brake-shoe in which a great pressure can be applied to the wheel for the purpose of checking the same and at the same time avoid the wearing-friction between the tread of the wheel and face of the shoe; and with these objects in view the invention consists, essentially, in providing the face of the shoe with a series of bearing-rollers; and the invention consists also in providing roller-bearings between the journals of the rollers and the shoe, thereby reducing the friction of all the parts to a minimum.

The invention consists also in certain details of construction and novelties of combination, all of which will be fully described hereinafter and pointed out in the claims.

In the drawings forming part of this specilication, Figure 1 is a perspective View illustrating a brake-shoe constructed in accordance with my invention. Fig. 2 is a detail sectional view illustrating the construction of the shoe, the rollers being removed and one of the side plates separated from the body of the shoe. Fig. 3 is a vertical sectional view. Fig. =l is a transverse section on the line & 4 Fig. 5 is a detail section taken through one of the journals. Fig. 6 is a detail perspective view showing one of the journals and also the roller-bearings used in connection therewith.

Referring to the drawings, A indicates the ordinary brake-beam, and B the bracket connected thereto and carrying the bracket-shoe C, said shoe being pivotally connected to the bracket in the usual manner. This brakeshoe is curved to conform to the curve of the wheel and is channeled from end to end, so that the said shoe virtually comprises the body portion O and the side portions The side portions O are cut away between the points C, and at regular intervals bearing-recesses Care produced. The brake-rollers l) are carried within the channeled face of the brake-shoe, said rollers having journals D, which are preferably bored longitudinally, as shown at D" for the purpose of receiving the roller-bearings E, which are interposed between the journals and the bearings, as most clearly shown in Fig. Side plates F are attached to the brake-shoe, each plate being provided with a forwardly-projecting lip F, which is adapted to tit into the cut-out portion of the side face of the shoe between the points (1, and, furthermore, each rib F is provided with the bearing-recess F which registers with the bearing-recess C, and in which the journals D, with the roller-bearings E, are arranged. A series of bolts G project from the side pieces O of the brake-shoe and extend entirely through the ribs of the side plates, nuts Gr being screwed upon the ends for the purpose of securing the said side plates to the shoe, and supplemental pins G project from the side pieces and extend part way through the ribs of the side plates. Transi 'erse bolts H are also employed for the purpose of connecting the plates to the shoe.

It will thus be seen that I provide a brakeshoe in which the bearing-surface consists of a series of bearing-rollers, and each bearingroller has rollerbearings for its journals, thereby reducing the friction of the parts to a minimum and prolonging the durability of the brake-shoe as a whole. Furthermore, the parts are so constructed and arranged that when the beari11g=1ollers become worn they can be quickly and easily removed and new ones substituted.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. Adevice of the kind described, comprising a channeled shoe, and a series of bearingrollers arranged therein, each bearing-roller having antifriction rollers surrounding its journals, as specified.

2. The combination With the journaled brake-shoe having its sides cut away and provided With bearing-recesses, of the side plates having inwardly-projecting lips,- each formed with bearing-rollers, and the roller-bearings, the journals of Which are arranged between the sides of the shoe, and the ribs of the side plates, substantially as specified.

3. The combination With the channeled brake-shoe, the sides of Which are cut away and provided with bearing-recesses, of the side plates attached to the shoe and having inwardly-projecting ribs formed also with bearing-recesses, the bearing-rollers having longitudinally-bored journals and roller-bearings arranged around the said journals and Within the recess formed in the sides of the shoe, and the ribs of the side plates, substantially as specified.

JAMES N. MCNEACE.

WVitnesses:

R. A. POWELL, FRED. BERTRAM. 

